Like any other metal, steel can become sharp or jagged when damaged. If you've got an iPhone 4S and you've physically damaged the volume buttons, a DIY repair can get them back into like new condition in no time. If you didn't opt for AppleCare+ and your normal warranty won't cover the damage, taking matters into your own hands may not be a bad idea.
Follow along and we'll walk you through how to get those buttons back into perfect condition for a lot less than what the cost of a new iPhone is.